Denver Airport is one of the largest airports in the world in terms of built-up area and passenger traffic (consistently in the top ten largest airports in the world).
United has one of its largest bases here, as does low-cost carrier Frontier Airlines.
Denver Airport's convenient location in the middle of the USA makes it one of the largest connecting hubs in North America and makes it a popular gateway to the Rocky Mountains.
The airport is easily recognisable by the unique architecture of the main terminal, whose roof is designed to resemble the snow-capped peaks of the Colorado mountains.
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